Food fads come and go. Some are good -- hello, Cronut! Some are everlasting -- bacon on everything! And some are just WTF -- flavored infused foams? Why, Ferran Adria, why? The latest craze sweeping across the country falls squarely into the last category. Yes, I mean “bone broth.”

Top Chef New Orleans Last Chance Kitchen Episode 4: Think Like a Prep Cook

Is it just us, or are the Last Chance Kitchen challenges becoming more and more sadistic as the seasons wear on? On last night’s installment, Tom Colicchio preyed upon Patty’s apparent shortcomings entering the competition as a sous chef, forcing she and Janine to chop a basket of onions before they began their work. Then, he made them do all their prep work in advance, and confiscated their knives once they began cooking. Oh, what’s that, Janine? You need a knife to cut your lemon in half for a last minute spritz of citrus? TOO BAD. Shoulda thought like a prep cook.